Hydraulic crowding device



Filed Dec. 1, 1933 3 Sheets-Sheet l Q mm hm Q Q mm .3 mu

8? an x Q Invenlor lV 7 Havens .4 By flllomey May 29, 1934. N. F. HAVENS HYDRAULIC CROWDING DEVICE Filed Dec. 1, 1953 3 Sheets-Sheet 2 /V. 7'. Havens 3 Sheets-Sheet 5 I mm M I. W I I 1 an wk m 4 o N. F. HAVENS HYDRAULIC CROWDING DEVICE Filed Dec. 1, 1933 May 29, 1934.

i. N N mm E w 1% Q m a 8 R 2 Ma lnvenior /V. F Havens flllorney Patented May 29, 1934 UNITED STATES HYDRAULIC CROWDING DEVICE V Neil F. Havens, Glen Falls, N. Y. Application December 1, 1933, Serial No. 700,599

2 Claims. (01.121-38) This invention appertains to new and useful improvements in crowding devices for use on power shovels, the principal object of the invention being to provide a device of this character which will eliminate considerable working parts now necessary in conventional shovels.

Another important object of the invention is to provide a crowding device of the character stated which is simple in construction and operation and which will not be susceptible to the development of ready defects.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:-

Figure 1 represents a fragmentary side elevational view of a power shovel, showing the crowding device mounted upon the boom.

Figure 2 represents a top plan view of the crowding device on the boom.

Figure 3 represents a side elevational view of the crowding device on the boom.

Figure 4 represents a longitudinal sectional view through the crowding device.

Figure 5 represents a cross sectional view through the device, taken substantially on line 5-5 of Figure 4.

Figure 6 represents a cross sectional view through the device, taken substantially on line 6-6 of Figure 4..

Figure 7 represents a longitudinal sectional view through the abutment and fluid feed barrels.

Referring to the drawings wherein like numerals designate like parts, it can be seen in Figure 1 that numeral 5 generally refers to the engine house of the shovel situated upon the platform 6. Numeral 7 represents the boom swingably connected to the platform at 8, while numeral 9 represents the crowding bar having the shovel 10 at its outer end. Numeral 11 represents the control cables for the shovel. Thecrowding device is generally referred to by numeral 12. As is clearly shown in Figures 2 and 3, as well as in Figure 5, bracket members 13-13 support blocks 14-15, in each of which is a plug valve, these valves being referred to by numerals 16-17 respectively.

Numerals 18-19 represent fluid conduits, each of substantially square cross section, and these are suitably secured to the blocks 14-15 so that they will be in horizontal parallel spaced relation, the outer ends of these conduits 18-19 being open to communicate with the cross passageway 20 in the block 14 and adjacent their inner ends provided with openings 21 for communication with the cross passageway 22 in the block 15, it being noted that the valves 16 and 17 are in the path of these passageways.

An elongated block 23 has a bore therein-for 0 receiving the cylinder 24 and located in this cylinder 24 is the abutment 25, from each end of which extends an elongated feed barrel 26, each barrel 26, adjacent the abutment 25, being provided with openings 27. The outer ends of the barrels 26 are threaded for disposition into the blocks 13-15 and as is clearly shown in Figure 4, these barrels 26 communicate with the cross passageways 20 and 23 by way of the valves 16 and 17. The barrels 26-26 are slidable through the packing glands 28 in the ends of the block 23 and springs 29 are interposed between the ends of the block (inside) and connected to the barrels so as to afford a cushioning effect when the cylinder block 23 is moved to its extreme positions.

Obviously, the inner end of the conduit 18 connects to a hydraulic reservoir, shown on the platform 6.

It can be seen that the vertical sides of the cylinder block 23 are tions of the conduits 18-19. Obviously, the conduits serve as rails or tracks slidably supporting the cylinder block 23. The under side of the block 23 is provided with a rack 32 running longitudinally thereof and this meshes with the gear 33 on the shaft 34 which is equipped at each end with a gear 35 which in turn meshes with the rack teeth 36 on the usual two legs of the crowding bar 9.

As is clearly shown in Figure 6, the valve 16 (as well as the valve 17) extends through a packing gland 38 and has a laterally disposed arm 39 secured to its upper end. These arms are connected together by the link rod 40 and the arm of the valve element 17 has a control rod 40 extending therefrom to a suitable control in the cab or on the platform 6 of the shovel.

It can now be seen that when the crowding bar 9 is to be operated, air is admitted by way of the conduit 18 and valve 16 and through the barrel 26 to the left in Figure 4. The air escapes through the openings 27 and into the chamber 42. This drives the cylinder block to the left in Figure 4 and causes the crowding bar 9 to be retracted. Obviously, by actuation of the rod 40, the action can be reversed, in that the valve 16 will be closed and the valve 17 opened so that fluid will be supplied by way of the conduit 18 and valve 17 to the barrel 26 on the right and from there into the chamber 43, resulting in the grooved to receive por- 80 expulsion of fluid from the chamber 42 and into the exhaust conduit 19 and the shifting of the cylinder block to the right in Figure 4.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:-

1. A motor of the character described comprising a pair of parallel conduit members,- a cylinder block slidably supported by the said conduit members, a pair of valveblocks-int'erposed between the said conduit membersandto which the members are secured, each of the said valve blocks being provided with a boreex tending therethrough and communicating with. the conduit members, a valve element in each of X the blocks interrupting the correspondingpassageway, an abutment inthe cylinder: block dividing the interior or". the blockintoa pair of: pressure compartments, a barrelextending from= each end of the abutmentand through-the ends of thecylinder block to connect tothe said'valve blocks,.said barrels communicatingwith the pas means connecting the said valves whereby one will be opened and the other closed simultaneously.

2. A motor of of the character described comprising a pair of parallel conduit members, a cylinder block slidably supported by the said conduit members, a pair of valve blocks interposed between the said conduit members and to which the members are secured, each of the said valve blocks being provided with a bore extending therethrough and communicating with the conduit members, a valve element in each of the blocks interrupting the corresponding passageway, an abutment in the cylinder block dividing the interior-of the block into a pair of pressure compartments, a-barrel extending from each end of the abutment and through the ends of the cylinder'block to connect to the said valve blocks, said barrels communicating with the passageways in the valve blocks and each provided with an openingadjacent the abutment ina corresponding chamber of the cylinder block, means con-- necting the said valves whereby one will be openedland the other closed simultaneously, and utility drive. means including a rack onthe bottom of the block, a rotatably mounted shaft having a pair of gears thereon, one of said gears meshing with the said rack and the other gear meshing with the utility to be driven.

' NEIL F. HAVENS. 

